US3253451A - Method and apparatus for crimping contact terminals - Google Patents

Method and apparatus for crimping contact terminals Download PDF

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Publication number
US3253451A
US3253451A US301109A US30110963A US3253451A US 3253451 A US3253451 A US 3253451A US 301109 A US301109 A US 301109A US 30110963 A US30110963 A US 30110963A US 3253451 A US3253451 A US 3253451A
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United States
Prior art keywords
strip
crimping
carrier strip
terminal
terminals
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Expired - Lifetime
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US301109A
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English (en)
Inventor
David R Kerns
Milton D Ross
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TE Connectivity Corp
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AMP Inc
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Application filed by AMP Inc filed Critical AMP Inc
Priority to US301109A priority Critical patent/US3253451A/en
Priority to GB31737/64A priority patent/GB1008323A/en
Priority to DE19641465101 priority patent/DE1465101B2/de
Priority to BE651497A priority patent/BE651497A/xx
Priority to CH1039464A priority patent/CH406345A/fr
Priority to NL646409136A priority patent/NL143379B/nl
Application granted granted Critical
Publication of US3253451A publication Critical patent/US3253451A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool

Definitions

  • Crimpable electrical terminals are frequently manufatcured in the form of ladder strip. Terminals of this type are stamped and formed from flat strip stock in sideby-side relationship to each other with each terminal being integral at one end, or at both ends, with a carrier strip. Whether a carrier strip is provided along only one side of the strip of terminals or along both sides (in which case each terminal is integral with-a carrier strip at both its forward end and its rearward end) will depend upon the size of the terminal, the relative thickness of the stock metal, and the precise shape or configuration of the termi nal.
  • the terminals connected to this carrier strip at their rearward ends; that is at the ends which are adapted to be crimped onto wires, for the reason that when the terminal is criruped between a pair of crimping dies it should be precisely positioned between the dies.
  • automatic and semi-automatic crimping machines having means for feeding the strip to position the leading terminal between the dies, more accurate positioning of the rearward end of the leading terminal between the dies can be achieved if this rearward end is rigidly connected to the carrier strip since the carrier strip will hold the rearward end in alignment with the dies Whereas the frontal end might be slightly out of alignment if the leading terminal does not extend precisely normally from the carrier strip.
  • This burr constitutes an unwanted metallic projection on the terminal which can lead to arcing when the terminal is put to use. Additionally, these burrs are capable of cutting the hands of the person holding the terminals and are undesirable for that reason. A further objection to such burrs is that when a terminal is inserted into a cavity in an insulating housing, the burr will sometimes engage the wall of the cavity and cause misalignment of the terminal.
  • An object of the present invention is to provide an improved feeding and crimping apparatus for electrical terminals and an improved method of feeding and crimping terminals.
  • a further object is to provide a ladder strip crimping apparatus having improved means for separating the leading terminal of the strip from the carrier strip at the time of crimping.
  • a further object is to provide an applicator for ladder strip terminals having improved means for fragmentizing the carrier strip at the time of crimping.
  • a still further object is to provide an applicator for terminals in ladder strip form having improved means for both fragmentizing the carrier strip and severing the leading terminal from the carrier strip, the fragmentizing and terminal severing means being arranged in a manner such that they do not interefere with the placement of the wire in the terminal so that improved accessibility is thereby obtained.
  • a terminal crimping applicator which is adapted to be used with a conventional bench press and which includes a reciprocable ram having crimping dies thereon cooperable with a fixed crimping anvil to crimp the wire barrel end of a terminal onto a wire.
  • the crimping applicator is similar in many respects to the applicator shown in application Serial Number 142,270, filed October 2, 1961, for Connector Feeding Device by Gilbert C. Weg, et al., and now Patent No.
  • the carrier strip is vsubjected to selective bending forces imposed normally of its own plane in a manner such that a clean fracture is obtained along the planes of weakness.
  • this final separating operation can be carried out without the imposition of unduly high stresses and a fracture devoid of burrs is obtained.
  • the weakening step is carried out by partially shearing the strip in the planes in which severing is effected at the time of crimping although other methods of weakening the strip can be employed.
  • FIGURE 1 is a frontal view, with parts broken away, of a preferred form of applicator incorporating the principles of the invention.
  • FIGURE 2 is a perspective view with parts broken away .of the preferred embodiment as viewed from the rearward side thereof.
  • FIGURE 3 is a sectional view taken along the lines 3-3 of FIGURE 6 showing the partial shearing mechamsm.
  • FIGURE 4 is a perspective view of the partial shearing mechanism.
  • FIGURE 5 is a view taken along the lines 5-5 of FIG- URE 3.
  • FIGURE 6 is a view taken along the lines 6--6 of FIGURE 5 and illustrating the manner in which the partial shearing of the ladder strip and the terminal is carried out.
  • FIGURES 7-13 are series of fragmentary and sectional views illustrating the final severing of the leading terminal of the strip from the carrier strip and the simultaneous fragmentation of the carrier strip into short lengths, FIGURES 7, 8, 10, and 12 being perspective views showing the various steps of the severing operation and FIGURES 9, 11, and 13 being side views illustrating the action of the severing tooling on the carrier strip.
  • FIGURE 14 is a sectional view taken transversely of the path of feed of the terminal strip and across the feed platform and showing the manner in which the terminal strip is guided towards the crimping zone.
  • FIGURE 15 is a frontal view showing the applicator ram and the spring loaded depressor which is integral with the ram and which actuates the partial shearing mechanism.
  • FIGURE 16 is a view taken along the lines 1616 of FIGURE 15.
  • the particular form of ladder strip 2 which the disclosed embodiment of the invention is adapted to apply to wire ends, comprises a plurality of terminals 4 in spaced apart side-by-side relationship, each terminal being integral at its rearward or wire crimping end with a continuous carrier strip 6.
  • the individual terminals each have a U-shaped ferrule forming portion 8 which is adapted to be crimped onto the insulation of a wire and a U-shaped ferrule forming portion 10, intermediate the ends of the terminal, which is adapted to be crimped onto the metallic core of the wire.
  • the forward end 12 of the terminal comprises a contact portion having a reversely bent tongue which is adapted to be engaged with the tongue of an. identical terminal.
  • a pair of relatively low upstanding flanges 13 are provided on the rearward end of the terminal adjacent to the carrier strip 6, these flanges serving the purpose of stabilizing the individual terminals when they are inserted into an insulating housing. Additionally, a pair of strengthening flanges 11 extend upwardly on each side of the web of the terminal between the wire crimping portion and the contact portion 12.
  • this leading terminal must be separated from the carrier strip and, in accordance with the instant invention, the portion 14 of the carrier strip which is adjacent to the leading terminal is severed from the strip.
  • the carrier strip will have been partially sheared, as shown at 16, at a point upstream from the leading terminal and an addi tional partial shear 18 will have been efiected at the rearward end of the leading terminal between the carrier strip and the terminal.
  • the partial shear 16 is formed by merely displacing the portion 14 of the carrier strip relatively downwardly with respect to the immediately adjacent portion of the carrier strip.
  • the carrier strip will have been partially sheared at 18 in a plane extending parallel to, and normally of, the carrier strip and between the carrier strip and the leading terminal.
  • the partial shear 18 is effected by a die set, described in detail below, which displaces carrier strip portion 14 downwardly with respect to the adjacent terminal and, at the same time produces an indentation on the underside of the strip.
  • This indentation has a relatively straight side 22 on the left as viewed in FIGURE 9 and a tapered side 24 on the right which slopes towards the external surface of the terminal.
  • the leading terminal is connected to the portion 14 of carrier strip 6 only by a relatively thin neck 26.
  • the partial shearing operation which is carried out upstream from the crimping station to the apparatus results in a high degree of work hardening of the metal of the neck 26 and along the plane of the shear 16 so that in these areas the metal is extremely hard and is subject to fracture without substantial elongation or plastic flow.
  • the leading terminal in FIGURE 7 is supported on an anvil 28 and the carrier strip 16 is supported on a block 140, the face 27 of which lies slightly behind the plane of the pre-shear 16 of the carrier strip. Separation of the leading terminal from the carrier strip portion 14 and fragmentation of the carrier strip is effected by means of a break-off tool 29 (FIGURE 15) having two depending legs 30 which straddle the axis of the leading terminal. The underside of each leg slopes upwardly and towards the rearward side of the tool, as shown at 32, and has a fiat surface 34 on its rearward side adjacent the rearward face of the leg.
  • the carrier strip portion 14 is bent downwardly as a unit with the neck portion 26 serving as a pivotal'axis.
  • Such downward bending of the carrier strip portion 14 initially causes a progressive fracture of the carrier strip along the plane of the pre-shear or partial shear 16 as shown in FIGURES 8 and 10, the fracture progressing from left to right in these views as the severing tool moves downwardly.
  • the disclosed embodiment of the invention which incorporates the partial shearing and severing tooling described above comprises a two-part housing 42, 44, the housing section 42 being mounted on a base plate 40 which is adapted to be secured to the platen of a press.
  • the housing section 44 has an extension 46 projecting therefrom in which a reciprocable feed slide is contained and which is described briefly below.
  • An applicator ram 48 (FIGURE 15 is slidably contained in the housing section 42 and has a knob 50 on its upper end which is adapted to be received within a slot in a press ram. It should be mentioned at this point that the construction of the disclosed applicator, insofar as the housing, the ram, and the strip feed mechainsm are concerned is substantially similar to that shown in the above-mentioned application Serial Number 142,- 270. Accordingly, only a brief description of this previously disclosed structure will be presented below, the description presented being limited to the amount necessary for an understanding of the partial shearing and the severing mechanisms of the instant invention.
  • the break-off tool 29 is mounted on the lower end of the ram 48 by means of a fastener 53.
  • a crimping die 54 for crimping the ferrule forming portion 8 of the leading terminal onto the insulation of the wire, and a crimping die 52, for crimping the ferrule forming portion 10 onto the conducting core of the wire, are also mounted on the ram by means of the fastener 53 and behind the break-01f tool.
  • Such adjustment of the shut height of these crimping dies is achieved by means of a pair of dials 58, 60 on the upper side of the ram which dials have bosses of varying heights for transmitting the thrust of the press ram to the dies.
  • the dial 60 transmits thrust from the press ram through the dial 58 to the applicator ram 48 and the crimping die 52. Thrust is transmitted from the press ram to the insulation barrel crimping die 54 by means of the dial 58 which extends beyond the sides of the applicator ram 48 and which has bosses of varying heights on its underside for selective engagement with a slide member 49.
  • This slide member is contained between a pair of ribs 51 which are integral with the ram 48 and is secured to the ram by a screw 55 which extends through an oversized slot in the slide member.
  • the upper end of the break-off tool 29 is held in a fixed position against the lower ends of the ribs 51 by. the screw 53.
  • the break-off tool is provided with projections 57 which extend into an oversized slot 59 in the crimping die 54 thereby to permit limited vertical movement of this crimping die with respect to the ram when the dial 58 is turned.
  • the terminal strip is fed over a plate 62 which extends rightwardly, as viewed in FIGURE 2, within the housing extension 46, the feeding of the strip being effected by a reciprocable slide 64 which is slidably mounted on the plate 62 and which has a finger on its underside (not shown) which extends upwardly to a slot in the plate 62 to engage the strip.
  • a yoke 66 integral with the slide 64 extends transversely across the upper surface of the plate 62.
  • a pair of guide bars 68 extend through openings in the yoke 66 and rearwardly througha flange 70 onthe end of the plate 62.
  • Springs 72 are interposed between the yoke 66 in the flange 70 normally to bias the feed slide leftwardly as viewed in FIGURE 2.
  • a strip guide bar 84 (FIGURE 14) is provided above the surface of the plate 62 and extends parallel to the strip of terminals. The lower edge of this guide bar is received between the U-shaped portion of each terminal and the flanges 11.
  • This guide bar is supported by means of a block 88 secured to an upstanding flange 89 on the side of the plate 62 at one end and at its opposite end is secured to a block 86 on the flange 70.
  • a drag rail 90 extends along the feed path and beside the carrier strip 6.
  • This drag rail is biased by means of springs 91 against the outside edge of the carrier strip .and is retained in position by a pin-slot connector as shown, This drag rail biases the strip rightwardly in FIGURE 14 so that the forward edges of the ears of ferrule-forming portion 10 are urged against the side of the guide rail 84 thereby to position the strip properly with respect to the shearing dies and the crimping dies.
  • FIGURES 3, 4 and 5 the tooling for effecting the pre-shearing operation is contained in a housing block 92 which is secured to an L-shaped block 94 on the upper surface of the base plate 40.
  • Block 94 is adjustably clamped by means of screws 96 to a support plate 98 which is, in turn, secured to the base plate 40.
  • an adjusting screw 100 is threaded into the rearward side of the plate 94 and has an integral collar 101 contained in a slot in a support block 102 which is also fastened to the plate 98. Rotation of the collar 101 thus has the effect of moving the tooling housing 92 towards or away from the front side of the applicator and, as Will be apparent from the description which follows, changing the position of the partial shear imparted to the terminal.
  • the partial shear tooling block 92 has a vertically extending channel 104 within the upper part of which an upper partial shearing die 106 is slidably mounted, a cover plate 108 being secured to the rearward side of the block 92 by means of fasteners to retain the shearing die.
  • An anvil 110 is adjustably secured in the channel 104 below a horizontally extending gap through which the ladder strip is fed.
  • Anvil 110 comprises a rectangular block having an upper surface 112 which is below the surface 114 over which the strip is fed.
  • a rib 116 extends along the upper surface of the anvil 110 parallel to the direction of strip fed, this rib having a cross section (FIGURE 3), which will produce the indentation on the terminal shown at 22 and 24 in FIGURE 9.
  • the lower side of the shearing die 106 is bevelled on its lefthand side, as viewed in FIGURE 5, to provide a clearance for the strip and on its righthand side has a projection 120 which extends parallel to and which cooperates with the edge 121 of the surface 114 to form the p-re-shear 16 of the carrier strip. It will also be noted from FIGURE 3 that the underside of the shearing die 106 slopes towards the front of the apparatus as shown at 118, that is the lower side slopes upwardly from the surface 112 of the anvil.
  • the terminal portion 26 Upon downward movement of the shearing die 106 relative to the anvil 110, the terminal portion 26 will be pushed against the rib 116 to form the partial shear in the plane extending between the rearward end of the terminal and the carrier strip. Substantially simultaneously, the foot or projection 120 will move the carrier strip downwardly relatively past the edge 121 to form the carrier strip partial shear 16.
  • the rearward side 117 of the shearing die 106 is coplanar with or extends very slightly rightwardly (as viewed in FIGURE 3) of the straight side of the rib 116 on the anvil so that downward movement of the shearing tool produces the shear face 18 as well as the indentation 20 on the underside of the strip.
  • the amount ofpartial shearing imparted to the ladder strip is dimensionally critical since the amount of partial shear must be sufficient to perm-it the severing operations illustrated in FIGURES 7-12 of the carrier and the terminal but at the same time the amount of partial shear must not be so great as to render the sheared zones subject to fracture prior to the intentional fracturing which takes place at the crimping station. It is therefore desirable to provide a precise adjustment for the position of the anvil 110 so that the position of its support surface 112 can be adjusted with respect to the surface 114 of the housing 92. In the embodiment disclosed the precise adjustment of the anvil is achieved by means of a polygonal spacer block 122 which supports the anvil 110 on the base plate 40.
  • this spacer is at different distances from its center so that rotation of the spacer block 122 results in raising or lowering of the anvil block 110.
  • the anvil block is otherwise held in position by means of a screw 124 which extends through an oversized opening in the frontal wall of the housing 92.
  • Access to the spacer block 122 is provided by means of an opening extending through this frontal wall and a kerf is provided in the spacer block so that it can be rotated with a screw driver.
  • the die 106 extends upwardly to the upper end of the housing 92 and has a bearing plate 126 secured to its upper end by means of a screw as shown.
  • Springs 128 interposed between the underside of the bearing plate 126 and the upper surface of the housing 92 normally bias the bearing plate and the shearing die 106 upwardly and out of engagement with the strip.
  • the pre-shear die is moved downwardly by means of a plunger 132 (FIGURE which has an enlarged upper end 133 contained within the previously mentioned housing 82.
  • a cover plate 130 on the lower end of the housing 82 overlaps the shoulders 131 of the plunger to retain it within the housing.
  • a helical spring 136 extends into an axial bore in the plunger 132 and bears at its upper end against the top wall of the housing 82.
  • a plurality of dish-shaped spring washers (Belleville washers) are contained in the housing and surround the spring 136 with the concave sides of juxtaposed washers facing each other. This stack of spring washers rests upon the upper surface of the plunger 132 and does not extend to the top wall of the housing 82 so that the plunger can be moved relatively upwardly from the position of FIGURE 15 with respect to the housing.
  • Such relative upward movement of the plunger is initially opposed by the spring 136 until the uppermost washer of the stack comes into engagement with the top wall of the housing. Thereafter, further relative upward movement of the plunger is opposed by the stack of washers which functions as an extremely stiff spring permitting further movement of the plunger only under the influence of a relatively high force.
  • the terminal which is positioned adjacent to the partial shearing tooling and the portion of the ladder strip which lies beneath the shearing die is subjected to the pre-shearing operation.
  • the compression spring 136 is first compressed until the shearing tool 106 is brought into engagement with the carrier strip.
  • the Belleville washers are compressed and the lower end of the shearing tool is forced against the carrier strip whereby the portion of the strip beneath the tool is displaced downwardly relative to the upstream portion to produce the shear 16 and is displaced downwardly relative to the terminal to produce the shear 18.
  • the indentation 20 is formed in the underside of the strip by the rib 116.
  • the parts will normally be in the positions of FIGURE 1.
  • the operator positions the end of a wire in the ferrule-forming portions 8, 10 of the terminal and actuates the press, in which the applicator is mounted, to drive the press ram and the applicator ram 48 through a single cycle.
  • Actuation of the press ram may be accomplished by means of a foot switch which is operative to engage a single revolution clutch on the drive shaft of the press.
  • the applicator ram moves downwardly, the ferrule-forming portions 8, 10 of the leading terminal are first partly crimped around the wire end. Thereafter, and upon further downward movement of the ram 48, the break-off tool 29, engages the carrier strip section 14 while the crimping operation is completed.
  • the carrier strip is severed from the leading terminal and fragmentized as described above and as illustrated in FIGURES 713.
  • the leading terminal is gripped between the crimping dies and the crimping anvil prior to engagement of the break-off tool with the carrier strip in order that the leading terminal will be held in a fixed position while the carrier strip is being bent and severed.
  • the par- .tial shearing operations are performed on an upstream section of the strip by the shearing mechanism while the leading terminal is being crimped onto a wire.
  • the phrase partial shearing is employed to identify the operations performed on the carrier strip at 16 and between the carrier strip and the terminals at 18 and 20.
  • the operation performed on the carrier strip at 16 is a shearing operation in that, if carried further, it would result in a complete severing of the carrier.
  • the operation performed at 18 and 20 on the strip and between the carrier strip and the terminals involves an indenting operation on the underside of the strip as well as a partial shearing operation.
  • the phrase partial shearing is therefore employed to denote these operations for purposes of convenience although the operations performed at 18 and 20 go somewhat beyond a simple shearing operation.
  • a salient advantage of the invention is that actual fracturing of the neck 26 takes place in a zone which lies below the upper surface 144 of the web of the terminal (FIGURE 13) and above the lower surface 146 of the web of the terminal.
  • the neck portion 26 is severely work hardened during the partial shearing operation, little or no burr is produced during the fracturing operation and the roughened surface which results when fracturing takes place lies within the planes defining the surfaces 144 and 146.
  • the burr, if any, and the roughened surface do not extend to the surfaces of the terminal so that the danger of arcing or personnel injury is eliminated.
  • An additional advantage of the disclosed embodiment is that the fragmentizing of the strip and the severing operation are carried out without the necessity of supporting the underside of the portion 114 of the carrier strip. As a practical matter this feature of the disclosed embodiment results in improved accessibility and greater operator convenience since the area in which the operator is required to handle the wire is not cluttered with a conventional pair of shearing blocks.
  • the disclosed embodiment of the invention achieves both a convenient means of separating the leading terminal from the strip and the fragmentation of the carrier strip, the operation of fragmentizing the carrier strip can be dispensed with if desired and if it is preferred to dispose of the scrap carrier strip in some manner other than by fragmentation.
  • Apparatus for crimping terminals onto wires said terminals being in side-by-side strip form and being secured to a carrier strip at one end
  • said apparatus comprising: a guide track for guiding said terminal strip towards a crimping zone, a crimping anvil in said crimping zone for supporting the leading terminal of said stn'p while leaving said carrier strip unsupported, a crimping die in said zone movable relatively towards and away from said crimping anvil, strip weakening means on said guide track upstream from crimping zone for weakening said strip in a plane extending beside said carrier strip and between said carrier strip and the individual terminal integral therewith thereby to render said individual terminals severable from said carrier strip upon bending of said carrier strip relative to said terminals, and severing means in said crimping zone for bending said unsupported carrier strip transversely of the plane of said feed track thereby to sever said leading terminal from said carrier strip during crimping of said leading terminal onto
  • Apparatus for crimping terminals into wires said terminals being in side-by-side strip form and being secured to a carrier strip at one end, said apparatus com prising, a guide track for guiding a section of terminal strip towards a crimping zone, a crimping anvil in said crimping zone for supporting the leading terminal of said strip while leaving said carrier strip unsupported, a crimping die in said zone movable relatively towards and away from said crimping anvil, partial shearing means on said guide track for partially shearing said strip in a plane extending substantially parallel to said carrier strip and between said carrier strip and the individual terminals on said strip, said plane extending transversely of the plane of said carrier strip, and severing means movable with said crimping die for engaging the portion of said ladder strip in said crimping zone concomitantly with engagement of the leading terminal of said strip by said crimping die and for bending said portion of said ladder strip relative to said leading terminal thereby to
  • Apparatus for crimping terminals onto the ends of wires said terminals being disposed in side-by-side strip form and being secured at their wire crimping ends to a carrier strip said apparatus comprising feeding and supporting means for feeding said strip along a predetermined path towards a crimping Zone, a crimping anvil in said crimping zone having a supporting surface for supporting the leading terminal of said strip while leaving said carrier strip unsupported, a crimping die in said zone movable relatively towards and away from said crimping anvil, partial shearing means on said feed path upstream, relative to the direction of strip feed, from said crimping zone for partially shearing said strip in a plane extending parallel to said ladder strip and between said ladder strip and the individual terminals in said strip, and severing means movable with said crimping die for engaging said carrier strip in said crimping zone concomitantly with engagement of said crimping die with said leading terminal whereby, said portion of said carrier strip in said cri
  • Apparatus for crimping terminals onto wires said terminals being in side-by-side strip form and being secured to a carrier strip at their ends which are adapted to be crimped onto wires, said apparatus comprising: a guide track for guiding said terminal strip towards a crimping zone, a crimping anvil in said crimping zone for supporting the leading terminal in said strip while leaving said carrier strip unsupported, a crimping die in said crimping zone movable relatively towards and away from said anvil, a first strip weakening means on said guide track upstream from said crimping zone for weakening said strip in a first plane extending beside said carrier strip and between said carrier strip and the individual terminals integral therewith, and a second strip weakenng means for weakening said strip in a plane extending transversely across said carrier strip, said weakening means serving to render said strip subject to fracture in said planes upon bending said strip relative to an adjacent terminal, and bending means movable with said die for engagement with
  • said weakening means comprises means for partially shearing said strip in said planes.
  • An applicator for crimping terminals onto wires said terminals being in side-by-side strip form and being secured to a carrier strip at their ends which are adapted to be crimped onto wires
  • said apparatus comprising: a guide track, means for intermittently feeding a strip of said terminals along said guide track, a reciprocable ram having crimping die means thereon, a crimping anvil cooperative with said crimping die to crimp the leading terminal of said strip onto a wire, strip weakening means on said ram for engaging said strip at a location upstream from said crimping die and weakening said strip in a plane extending beside said carrier strip and between said carrier strip and the individual terminals integral therewith thereby to render said terminals severable from said carrier strip upon bending of said carrier strip relative to said terminals, and means on said ram for applying a bending force to said carrier strip during crimping of said leading terminal thereby to sever said leading terminal from said carrier strip.
  • strip weakening means comprises means for partially shearing said strip.
  • Apparatus as set forth in claim 6 including a second strip weakening means for weakening said carrier strip in a plane extending transversely of its length whereby, upon bending, said carrier strip is fragmentized.
  • first and second weakening means comprise means for partially shearing said strip in said planes.
  • the method of crimping terminals onto wires comprising the steps of: intermittently feeding a strip of said terminals towards a crimping zone, weakening said strip in a first plane extending parallel to said carrier strip and between said carrier strip and said terminals, crimping the leading terminal of said strip onto a wire and concomitantly applying a normal force to the portion of said carrier strip which is adjacent to said leading terminal thereby to bend said adjacent portion relative to said leading terminal and to fracture said strip in said weakened first plane.
  • a method as set forth in claim 10 including the step of weakening said strip in a second plane adjacent to, and upstream from, said first plane and extending transversely across said carrier strip whereby said carrier strip is firactured in said second plane under the influence of said normal force.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
US301109A 1963-08-09 1963-08-09 Method and apparatus for crimping contact terminals Expired - Lifetime US3253451A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US301109A US3253451A (en) 1963-08-09 1963-08-09 Method and apparatus for crimping contact terminals
GB31737/64A GB1008323A (en) 1963-08-09 1964-08-05 Method and apparatus for crimping electrical connectors to wires
DE19641465101 DE1465101B2 (de) 1963-08-09 1964-08-06 Verfahren und Gerät zum Abtrennen elektrischer, durch Trägerstreifen mit einander verbundener Verbinder, die an elektrische Leiter angedrückt werden
BE651497A BE651497A (nl) 1963-08-09 1964-08-06
CH1039464A CH406345A (fr) 1963-08-09 1964-08-07 Procédé pour sertir des connecteurs électriques et appareil pour la mise en oeuvre de ce procédé
NL646409136A NL143379B (nl) 1963-08-09 1964-08-07 Werkwijze voor het krimpen van elektrische verbindingsorganen op draden en inrichting voor het uitvoeren van deze werkwijze.

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US301109A US3253451A (en) 1963-08-09 1963-08-09 Method and apparatus for crimping contact terminals

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US3253451A true US3253451A (en) 1966-05-31

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US301109A Expired - Lifetime US3253451A (en) 1963-08-09 1963-08-09 Method and apparatus for crimping contact terminals

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US (1) US3253451A (nl)
BE (1) BE651497A (nl)
CH (1) CH406345A (nl)
DE (1) DE1465101B2 (nl)
GB (1) GB1008323A (nl)
NL (1) NL143379B (nl)

Cited By (9)

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Publication number Priority date Publication date Assignee Title
US3420086A (en) * 1966-06-03 1969-01-07 Amp Inc Hand tool for crimping terminals
US4216668A (en) * 1979-04-02 1980-08-12 Burroughs Corporation Crimping tool head
US4598570A (en) * 1985-01-10 1986-07-08 Joseph Baldyga Apparatus for crimping electric terminals
US4654952A (en) * 1986-07-09 1987-04-07 Diamond Die & Mold Co. Wire locater for electrical terminal crimping apparatus
US5176228A (en) * 1991-01-18 1993-01-05 Diamond Die & Mold Company Brake assembly for strip feeding drive
US5390410A (en) * 1992-09-01 1995-02-21 Sumitomo Wiring Systems, Ltd. Terminal crimping apparatus
US5491994A (en) * 1991-12-11 1996-02-20 Diamond Die & Mold Company Crimp height monitor
US6751997B1 (en) * 1999-10-19 2004-06-22 Hydropulsor Ab Stamping press arrangement and method
US9819134B2 (en) 2015-02-27 2017-11-14 General Electric Company Tool for stripping and crimping a wire

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Publication number Priority date Publication date Assignee Title
GB9012073D0 (en) * 1990-05-30 1990-07-18 Amp Gmbh Electrical terminal applicator and a crimp height adjustment plate therefor

Citations (2)

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Publication number Priority date Publication date Assignee Title
US3002547A (en) * 1958-08-18 1961-10-03 Amp Inc Terminal applicator
US3070144A (en) * 1960-02-11 1962-12-25 Amp Inc Ladder strip applicator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002547A (en) * 1958-08-18 1961-10-03 Amp Inc Terminal applicator
US3070144A (en) * 1960-02-11 1962-12-25 Amp Inc Ladder strip applicator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420086A (en) * 1966-06-03 1969-01-07 Amp Inc Hand tool for crimping terminals
US4216668A (en) * 1979-04-02 1980-08-12 Burroughs Corporation Crimping tool head
US4598570A (en) * 1985-01-10 1986-07-08 Joseph Baldyga Apparatus for crimping electric terminals
US4654952A (en) * 1986-07-09 1987-04-07 Diamond Die & Mold Co. Wire locater for electrical terminal crimping apparatus
US5176228A (en) * 1991-01-18 1993-01-05 Diamond Die & Mold Company Brake assembly for strip feeding drive
US5491994A (en) * 1991-12-11 1996-02-20 Diamond Die & Mold Company Crimp height monitor
US5390410A (en) * 1992-09-01 1995-02-21 Sumitomo Wiring Systems, Ltd. Terminal crimping apparatus
US6751997B1 (en) * 1999-10-19 2004-06-22 Hydropulsor Ab Stamping press arrangement and method
US9819134B2 (en) 2015-02-27 2017-11-14 General Electric Company Tool for stripping and crimping a wire

Also Published As

Publication number Publication date
CH406345A (fr) 1966-01-31
DE1465101B2 (de) 1970-11-05
GB1008323A (en) 1965-10-27
BE651497A (nl) 1964-12-01
NL6409136A (nl) 1965-02-10
NL143379B (nl) 1974-09-16
DE1465101A1 (de) 1969-01-23

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